Traveling Wave Magnetic Field Research Articles

有限要素法による進行波磁界およびうず電流解析

有限要素法による進行波磁界およびうず電流解析

Finite‐element solution of traveling wave magnetic field and eddy current

Electrical Engineering in JapanVolume 96, Issue 4 p. 75-82 Article Finite-element solution of traveling wave magnetic field and eddy current Hironori Okuda, Hironori Okuda Hitachi Research Lab. Hitachi LtdSearch for more papers by this author Hironori Okuda, Hironori Okuda Hitachi Research Lab. Hitachi LtdSearch for more papers by this author First published: 1976 https://doi.org/10.1002/eej.4390960411AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Volume96, Issue41976Pages 75-82 RelatedInformation

Axial magnetic field effects on a saturated He-Ne laser amplifier

The behavior of a He-Ne laser amplifier in the presence of an axial magnetic field has been studied experimentally by measuring Faraday rotation and gain for various values of input signal intensity. Two high-gain transitions in the 3.39-μ region were used for study-a <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">J = 1</tex> to <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">J = 2</tex> transition and a <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">J = 1</tex> to <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">J = 1</tex> transition. Theoretical expressions have been developed, which included the nonlinear effects of saturation strength signals. Experimental results clearly show saturation of Faraday rotation; in addition, for the <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">J = 1</tex> to <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">J = 1</tex> transition, a Faraday rotation reversal and a traveling-wave magnetic field dip are seen. These results match the theoretical predictions and provide a method for measuring the upper (3s <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> ) level quadrupole moment decay rate.